git.gag.com Git - sw/motorsim/blob - src/com/billkuker/rocketry/motorsim/grain/Star.java

   1 package com.billkuker.rocketry.motorsim.grain;\r
   2 \r
   3 import java.awt.Shape;\r
   4 import java.awt.geom.Area;\r
   5 import java.awt.geom.Ellipse2D;\r
   6 import java.awt.geom.GeneralPath;\r
   7 import java.beans.PropertyVetoException;\r
   8 \r
   9 import javax.measure.quantity.Length;\r
  10 import javax.measure.unit.SI;\r
  11 \r
  12 import org.jscience.physics.amount.Amount;\r
  13 \r
  14 import com.billkuker.rocketry.motorsim.Validating;\r
  15 import com.billkuker.rocketry.motorsim.grain.util.BurningShape;\r
  16 import com.billkuker.rocketry.motorsim.grain.util.ExtrudedShapeGrain;\r
  17 import com.billkuker.rocketry.motorsim.visual.Editor;\r
  18 import com.billkuker.rocketry.motorsim.visual.GrainPanel;\r
  19 \r
  20 public class Star extends ExtrudedShapeGrain implements Validating {\r
  21         private Amount<Length> oD = Amount.valueOf(30, SI.MILLIMETER);\r
  22         private Amount<Length> iD = Amount.valueOf(5, SI.MILLIMETER);\r
  23         private Amount<Length> pD = Amount.valueOf(15, SI.MILLIMETER);\r
  24         private int pointCount = 5;\r
  25         \r
  26         public Star(){\r
  27                 try {\r
  28                         setLength(Amount.valueOf(70, SI.MILLIMETER));\r
  29                 } catch (PropertyVetoException e) {\r
  30                         e.printStackTrace();\r
  31                 }\r
  32                 generateGeometry();\r
  33         }\r
  34         \r
  35         private void generateGeometry(){\r
  36                 double odmm = oD.doubleValue(SI.MILLIMETER);\r
  37                 double idmm = iD.doubleValue(SI.MILLIMETER)/2.0;\r
  38                 double pdmm = pD.doubleValue(SI.MILLIMETER)/2.0;\r
  39                 \r
  40                 xsection = new BurningShape();\r
  41                 Shape outside = new Ellipse2D.Double(-odmm/2, -odmm/2, odmm, odmm);\r
  42                 xsection.add(outside);\r
  43                 xsection.inhibit(outside);\r
  44                 //xsection.subtract(new Ellipse2D.Double(-idmm/2, -idmm/2, idmm, idmm));\r
  45                 webThickness = null;\r
  46                 \r
  47                 GeneralPath p = new GeneralPath();\r
  48                 double theta = 0;\r
  49                 double dTheta = (2.0 * Math.PI) / ( pointCount * 2.0 );\r
  50                 p.moveTo(0, idmm);\r
  51                 for ( int i = 0; i < pointCount; i++ ){\r
  52                         theta += dTheta;\r
  53                         p.lineTo(pdmm*Math.sin(theta), pdmm*Math.cos(theta));\r
  54                         theta += dTheta;\r
  55                         p.lineTo(idmm*Math.sin(theta), idmm*Math.cos(theta));\r
  56                 }\r
  57                 p.closePath();\r
  58                 xsection.subtract(new Area(p));\r
  59         }\r
  60         \r
  61         public Amount<Length> getOD() {\r
  62                 return oD;\r
  63         }\r
  64 \r
  65         public void setOD(Amount<Length> od) throws PropertyVetoException {\r
  66                 if (od.equals(this.oD))\r
  67                         return;\r
  68                 this.oD = od;\r
  69                 generateGeometry();\r
  70         }\r
  71 \r
  72         public Amount<Length> getID() {\r
  73                 return iD;\r
  74         }\r
  75 \r
  76         public void setID(Amount<Length> id) throws PropertyVetoException {\r
  77                 if (id.equals(this.iD))\r
  78                         return;\r
  79                 iD = id;\r
  80                 generateGeometry();\r
  81         }\r
  82         \r
  83         public Amount<Length> getPointDiameter() {\r
  84                 return pD;\r
  85         }\r
  86 \r
  87         public void setPointDiameter(Amount<Length> pd) throws PropertyVetoException {\r
  88                 if (pd.equals(this.pD))\r
  89                         return;\r
  90                 pD = pd;\r
  91                 generateGeometry();\r
  92         }\r
  93         \r
  94         public int getPointCount(){\r
  95                 return pointCount;\r
  96         }\r
  97         \r
  98         public void setPointCount(final int points){\r
  99                 pointCount = points;\r
 100                 generateGeometry();\r
 101         }\r
 102         \r
 103         \r
 104         public static void main(String args[]) throws Exception {\r
 105                 Star e = new Star();\r
 106                 new Editor(e).showAsWindow();\r
 107                 new GrainPanel(e).showAsWindow();\r
 108         }\r
 109         \r
 110         @Override\r
 111         public void validate() throws ValidationException{\r
 112                 if ( iD.equals(Amount.ZERO) )\r
 113                         throw new ValidationException(this, "Invalid iD");\r
 114                 if ( oD.equals(Amount.ZERO) )\r
 115                         throw new ValidationException(this, "Invalid oD");\r
 116                 if ( getLength().equals(Amount.ZERO) )\r
 117                         throw new ValidationException(this, "Invalid Length");\r
 118                 if ( iD.isGreaterThan(oD) )\r
 119                         throw new ValidationException(this, "iD > oD");         \r
 120         }\r
 121 }\r